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Journal of Chemistry
Volume 2015, Article ID 654802, 6 pages
Research Article

Detection of T91 Steel Corrosion with a Fe3+-Enhanced Fluorescence Probe

Department of Environmental Engineering, Shanghai University of Electric Power, Shanghai 200090, China

Received 6 July 2014; Accepted 12 September 2014

Academic Editor: X. Guo

Copyright © 2015 Tie Feng Xia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We study a rhodamine-based fluorescent compound (FD2) as corrosion indicator for T91 steel in 3% NaCl solution. FD2 has a desirable property of “turn-on” fluorescence emission via forming a complex with Fe3+ ions. The varying of fluorescence intensity is linked to that of weight-loss of T91 steel. Early attack on T91 steel was detected using fluorescence microscopy. This nondestructive method of initial corrosion detection can be used during maintenance before serious damage happens.